import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/users/Users.vue'
import Rights from '../components/powers/Rights.vue'
import Roles from '../components/powers/Roles.vue'
import Categories from '../components/goods/Categories.vue'
import Params from '../components/goods/Params.vue'
import Goods from '../components/goods/Goods.vue'
import Add from '../components/goods/Add.vue'
import Orders from '../components/orders/Orders.vue'
import Reports from '../components/reports/Reports.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    // 当访问根路径时重定向到登陆页面
    // 1.重定向 redirect: '/login'
    // 2.组件路由 component: Login
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login,
  },
  {
    path: '/home',
    // redirect 优先级高于 component
    component: Home,
    redirect: '/welcome',
    children: [
      {
        path: '/welcome',
        component: Welcome
      },
      {
        path: '/users',
        component: Users
      },
      {
        path: '/rights',
        component: Rights
      },
      {
        path: '/roles',
        component: Roles
      },
      {
        path: '/categories',
        component: Categories
      },
      {
        path: '/params',
        component: Params
      },
      {
        path: '/goods',
        component: Goods
      },
      {
        path: '/goods/add',
        component: Add
      },
      {
        path: '/orders',
        component: Orders
      },
      {
        path: '/reports',
        component: Reports
      }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 从哪个路径跳转而来
  // next 是一个函数，表示放行
  //  1.next() 放行
  //  2.next('/login') 强制跳转
  if (to.path === "/login") return next();
  // 获取 token
  const tokenStr = window.sessionStorage.getItem("token");
  if (!tokenStr) return next("/login");
  next();
});



export default router
